Base-lock for horizontal sectional units.



E? G. SAMPSON.

BASE LOOK FOR HORIZONTAL SEOTIONAL UNITS.

APPLICATION FILED NOV. 15, 19 10.

Patented Aug. 20, 1912.

4 SHEBTS-SHEET 1.

we at. aw K I F I I URU I I EW H WITNESSES INVENTOR g/ A S ATTORN EY CTIONAL UNITS.

2 1 9 1 O 2 m 1 A d 8 b H 6 b a P 0 l 9 1 5 l 0 N D E L I P. N O I T A flv I L P P A I 4 00 I 6 3 0 0 l 4 SHEETS-SHEET 2.

WETNESSES INVENTOR WITNESSES E. G. SAMPSON. 7 BASE LOOK FOR HORIZGNTAL SEGTIONAL UNITS.

APPLICATION FILED NOV. 15, '1910.

Patented Aug. 20, 1912 4 SHEETS-SHEET 3.

INVENTOR E. G. SAMPSON.

BASE LOOK FOR HORIZONTAL SECTIONAL UNITS.

APPLICATION FILED NOV. 15, 1910.

1,036,345, Patented Aug. 20, 1912.

4 SHEETSSHEBT 4 5 /90; f g fg/fi'. I grrwyW UNITEDSTATES PATENT OFFICE.

ERIC G. SAMPSON, OF JAMESTOWN, NEW YORK, ASSIGNOB TO ART MET AL CONSTRUC- TION COMPANY, OF JAMESTOWN, NEW YORK, A CORPORATION OF NEW YORK.

BASE-LOCK FOR HORIZONTAL SECTIONAL UNITS.

To all whom it may concern: I

Be it known that I, ERIC G. SAMPSON, a citizen of the United States, residing at Jamestown, in the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Base- Locks for HorizontalSectional Units, of whichthe following is a specification.

This invention relates to mechanism for locking drawers and is particularly adapted for use in horizontal units made of either wood or metal, which units are capable of being stacked up in a verticalseries, similar to the so called well known Werneckesectional book cases and filing cases.

The invention. also relates to the construction of such unitsin metal.

' One objectof my invention is to construct a base section havinga locking and controlling mechanism therein.

Another object of my invention is to construct intermediate horizontal sectionscapable of engaging with or being stacked up on said base section, said horizontal section containing drawers or other filing mechanism.

Another object of-my. invention is to providesaid horizontal sections with a locking mechanism for said drawers to prevent the opening thereof.

Another object of my invention is to make said horizontal sections interchangeable gtherand with the base section with which they are associated.

Another object of my invention is to make the locking mechanism of each section complete within "itself, a part of such locking mechanism interchangeably connecting, registering and interlocking with the locking mechanisms of other sections and with the base section by which .it may be controlled.

Another object of my inventionzis to construct the locking mechanism so'as to pernot the return of and the locking of individual drawers without disturbing the remaining drawers or unlocking the locking mechanism s a whole.

Another object of my invention is to cover the vertical series with a top section that will close and conceal all the locking mechanism that is not concealed by the base and intermediate section.

Another object of my invention is to en- Specification of Letters Patent. Patented Aug 1912,- Application filed November 15, 1910.

Serial-No. 592,578.

able the locking mechanism ofthe base.t0 operate and control all the locking mechanism of the series of sections above the base.

These and other objects of my invention is a perspective view of the base and a Se-' rles of horizontal unitslthereon, with the locking mechanism therefor constructed according to my invention. Fig. 2 is a perspective detail view in skeleton form of the base lock and a portion of the locking mechanism of one of the horizontal sections.

Fig. 3 is a detail view of the bracket on one of the intermediatesect-ions with the interlocking rod of the base section connected thereto." Fig. 4 is a detail view of the interlocking rod of the intermediate horizontal sections. Fig. 5 is a detail view of theleverj connecting the interlocking rod to the con-' necting rod of the horizontal section. -Fig. 6 is a detail view of the pawl that is used 'for connecting two consecutive interlocking rods. Fig. 7 is a. detail of one of the dogs for locking the drawers. Fig. 8 is a detail of the dog connecting the connecting rod with one of the rock shafts. Fig. 9 is a detail view ofone of the bell crank connections used in the base. I Fig. 10 is a detail of the interlocking rod of the base section.

Fig. 11 is'a vertical longitudinal-section through the series on the line 11 -11 of- Fig. 12. Fig. 1 2. is a vertical transverse section on the line 12"12 of Fig. 11. Fig. 13 is a horizontal'section' through one of the intermediate sections on the line 1313 of Fig. 11. Figs. 14 and 15 illustrate a modification of the locking barwlO.

In the drawings, reference numeral 1 indicates a base constructed preferably in the sanitary form, supported by legs 2, 2. This base contains the locking andc'ontrolling mechanism by which the drawers or other filing devices in the intermediate sections.

superimposed thereon are lockedyand released or otherwise controlled. The front panel or angle 3 of this base is perforated at 4. through which projects the front end of the sliding bar 5. Mounted in the rear of the base is a bracket 6 which is perforated at. 7 throughgvhich the bar 5 also passes, so

that in this way the bar 5 is mounted to slide in the panel 3 at the front and the bracket 6 at the rear.

hlounted on the front panel 5.3 is a lock 8 having a tongue 2') therein. When the key is inserted and turned the tongue is lifted and in turn lifts a leaf spring 4) that engages with a recess 10 in the bar 5, with which the spring 9" is capable at" engaging when the bar is placed in its innermost position. By turning a key in the lock 8 the spring 9 can be lifted out of engagement with the bar ,5 and the bar will be released to be drawn out by hand or thrown out by a spring 10 to cause the unlocking of the drawers in the sections controlled thereby.

Mounted on the base at. the rear is the bell crank 11, one arm of which engages with the slot in the rear end of the bar 5, and the other end of which connects with the pitman 13 which is nountcd to slide transversely of the bar The other end of the pitinan 13 engages with the bell crank lever 14; mounted to oscillate in the bracket 15 on the base section. The free end of this bell crank 14 engages with a slot 16 in the interlocking rod 17, the lower end ofwhich rod passes through a slot 18 in the bracket 15 mounted on the base, and the upper end of which passes through the slot 19 in the top of the base section by which the interlocking rod 17 is held to a vertical endwise movement. The interlocking rod 17 carries at its top a recess 18 above a stud 1t) fastened thereon below said -ece. ;s.

An intermediate section is shown in Fig. 1 comprising three vertical series ofdrawers, each series. having six drawers therein.

This section is built on the base plate 20 on which are erected the uprights ll, 2]. at the front and 22, 22 at the rear. These uprights 21 and 22 are preferably channels formed of sheet metal and having reduced ends with shoulders adjacent thereto, for a purpose that will presently appear. At regular intervals through their length these channels are slotted at 23, 23, with which -slots engage the horizontal division plates 24 These division plates have the front and rear edges thereof bent down to form a channel which fills thc'height of the openings 23. In the section illustrated in 1'' lg. 1, four of these channels are used at the front and four at the back, the rear channels .23 being preferably somewhat deeper so as to provide adequate hearings for the rock shafts 2t) mounted therein. The division plates 24 terminate"within the end channels and the ends of the division plates are beat up to form aflange at 24 that engages on the inside of these channels and interlocks therewith. The division plates also carry thereon the channel irons 25 which channels are connected thereto in any suitable manner, preferably a rivet, which chanhottoin plate 31.

nels brace the frame longitud nally and serve as guides for the drawers or tiling devices that are carried by the section, The front channels are interchangeal'ile with each other, as are the rear channels as well.

The rear channels have reduced ends 28.

which pass through suitable perforations in the top plate 27 of the channel which reduced end is cut transversely, one-half thereof being bent to the right and the other half thereof being bent to the left, locking the top plate 27 securely against the shoulder 28 leftat the top'of the channel. Similar reduced ends. are provided at the. bottoni'of the channels 22 and at the top and bottom of channels 21, wheriby these channels con nect rigidly to the top plate 527 and to the The top plate 97 has a. channel 3! formed therein which stitl ens the plate at the front and which bears on the bottom plate of the next section above and assists to support it. The bottom plate of each section has its front edge bent down as shown at 3?), and its other edges are bent down and in. forming channels. The botsection below it. To provide for the channel 3-1 on the rear of the bottom plate, the channels 22 of the section are recessed as shown at 215. The base plate 31 of each section is perforated at 86, through which perforation extends the interlocking rod 17 in l the base section. Inm'iediatcly above this perforation is a bracket 38, mounted on the base plate 7 31. The upper end of this bracket 38 is slotted at 35) and is turned down at right angles. The top plate 27 is perforated immediately above the opening 3!) in the bracket and through these two openings passes the interlocking rod 4-0 of the intermediate section. This interlocking rod 40 carries at both its top and bottom a. U-shaped recess similar to that shown at the top of the interlocking rod 17 in the base section. The interlocking rod 40 is also provided immediately below the upper reccss with a stud all and immediately above the lower recess with a stud 42. The stud '41 projects to the right as shown in Fig. l, ,and the stud 4-2 projects to the left.

It. will be seen that the interlocking rod 40 is offset at 4-3 as shown in Fig. 2. This is to enable the lower end of the interlocl-zing rod 40 of the upper section to engage properly with the stud 41 of the lower swtion and to enable the stud 4.2 of the interlocking rod of the upper section to cnga e with the U-shaped opening at the top of the interlocking rod 40 ofthe lower section. In this .Way the joints between (ZOHHttZHl'lYt'H interlocking rods are made interchangoable.

The interlocking rods 40 of the intermediatesections and the interlocking rod 17 of the base section are connected positively for simultaneous reciprocation by the latches or dogs 44, which dogs are pivoted on the stud 42 at the bottom of the interlocking rod 40. The dogs 44 are pivoted on the same side of the interlocking bar 40 as are the with such stud and the connection is formed thereby. A lug 46 is formed on the dog 44 by punching the metal of the dog, cutting it on three sides and leaving it attached to the dog on the fourth side! This lug is bent up slightly, leaving it parallel with the dog, and forms an abutment which bears against the interlocking bar 40 which carries it, preventing the dog from being turned too far, making a positive stop therefor.

Pivoted on the bracket 38' at 47 is the latch or lever 48. This latch has a slottedend 49 which engages with the stud 42, on the lower end of the interlocking bar 40, 'so that the reciprocation of the bar 40 causes the lever 48 to rock. On the other'end the lever 48 is provided with the tongues 50 and 51 inclosing between them a curved recess. At the rear the bracket 38 is provided with a pentagonal opening 52'through which extends a square rock shaft 29. Mounted on this rock shaft is'the crank 53, which crank has a squareopefning which just fits the outline of the shaft 29. The crank 53'has two lugs formed thereon, 54 and 55. "The lug 54 extends between the tongues 50 and 51 of the lever 48, so that the rocking of the lever 48.

causesthe rocking ofthecrank 53, with a lost motion between'them. The lug 55 is perforated and has connected thereto a spring 56, the other end of which spring is connected to the perforated lug 57 formed on the bracket 38. The crank 53 is perforated with a bearing 58 to which is connected a connecting rod 59.

A plurality of rock shafts 29 are mounted in each section, one for each horizontal row of drawers. The connections heretofore described are peculiar to the lowest rock shaft 29.. Cranks 53 however are mounted on the end ofeach of these rock shafts, and for convenience such cranks are similar to the one mounted on the lower rock shaft 29, although the lugs 54 and 55 for such-cranks may be dispensed with. All the cranks 53 on the ends of the rock shafts 29 of one section are connected for simultaneous movement by the connecting rod 59. Each of the i as square rock shafts 29 is mounted. in pentag- I onal openings provided therefor in the channels 22, and each rock shaft extends substanl tially the full length horizontally of the section. On these rock shafts at suitable intervals are provided the locking dogs 60 and 61, a pair of these dogs being provided for each drawer or filing device that is to be separately locked. These engage with a suitable recess or projection on the drawer when the parts are in the position shown in Fig. 2, andwill be disengaged from the drawers leaving the drawers free to be with: drawn from the case when the bar 5 has been unlocked and has been thrown forward by the spring l0 or drawn forwardmanually. Through the mechanism heretofore described this movement of the bar 5 will rock all of the shafts 29, causing the'dogs to dogs 60 and 61 are substantially alike except that the dog 61 has a square hole therein as indicated in full lines in Fig. 7, while the dog 60 has a pentagonal hole illustrated by full and dotted lines in Fig. 7. The dog 60, by reason of its loose connection with the shaft 29, has a limited amount of lost motion thereon, so that the rocking of the shaft either bythe rod 5 or by the lifting of the dog 61 directly will not lift the dog 60 immediately as well. The object of this I am now about to describe.

1V henthe case has been locked up so that none of the drawers can be removed therefrom, it sometimes happens that a drawer has been left out and it is desirable to return this drawer without unlocking the case. When such a drawer is pushed in to its locked position, the drawer will react on the dog 61 rocking the shaft 29 on which said dog is mounted, and all of the shafts in the section connected therewith, until the recess in the drawer has passed the tip end 62 on the locking dog 61, when the dog 61 will deas well. l/Vhile the dogs 61 are in their raised position, however, any other drawer could be withdrawn from the case except for ously with the dogs 61, butlag behind them to a certain extent, holding all the other raise up, thus releasing the drawers. Thescend and lock the drawer that is inserted the dogs 60 which do not raise'simultanethe inserted drawer is fully in, the dog 61 of a drawer without communicating this motion to the interlocking rod 40 of its own section, and therefore it will not disturb the a thereon, 41442 res ectivelv.

to this bar I provi e the coupling bar 7 5 rock shafts 29 in adjacent sections, nor will it move or disturb the base lock.

The unlocking and controlling mechanism of the locking device for each section is carried at the right hand end of the section as shown in Fig. 1 and between doubled ends with which the section is provided, the end panel plate concealing this mechanism from view from without and the inner plate concealing it from view from within.

To permit of the ready assembling and dis-assembling of the *arious sections, it is necessary to arrange the interlocking mechanism so as to be readily connected and dis connected in the consecutive sections. To provide for this I arrange the interlocking mechanism as follows: The dog 4.4 carried on the lower end of the interlocking rod 40 has its lower edge beveled, as shown at (35. hen the section containing the interlocking rod 40 is lowered on the section next below it, this bevel (55 contacts with the stud on the interlocking rod below it, causing the latch eil to swing to the left from the position shown in Fig. i until the stud has passed the tip ofv the latch at the upper end of this bevel.- 'lherealter the latch will swing back to position, locking the stud 19 between it and the interlocking bar 4:0. In this way the coupling of consecutive interlocking rods is etl'ected automatically. To disengage them I provide as follows: In the inner end plate opposite the latch 4A is an opening through which the latch 44 can be reached. The latch 4;31- has a lug'titl formed thereon which projects through said opening. By removing the lower drawer this lug and its latch may be reached by a hook and drawn back out of engagement with the stud 19, thus permitting the upper section to be removed from the lower one. \Vh ere the sections are provided with larger drawers the latch may be reached with the hand and disengaged, as the opening left by the removal of the drawer will be large enough to permit this.

From each section the interlocking rod projects up several inches, and above the top section the locking rod 40 is exposed to this extent. A top or cover section 64 is placed on top of the vertical series and this section is high enough to cover the exposed end of the interlocking rod 40, the top section being left hollow or recessed to permit this rod to play up and down therein as the controlling rod is operated. In order to avoid having the locking rod 410 project above each of the sections, I may provide a small couplingbar between the bars of each of the sections. Such a bar is illustrated in Figs. 1a and 115. In such case a modified locking bar 40 would be used having two studs In addition having a recess 76 \thercon which engages with the stud ll. and a reduced end 77 which together with the shoulder at the side thereof, engages with the stud i2. At the top of this bar T5 is carried a stud t1 and a U-shaped opening similar to that shown on the locking bar it), for the pin-pose of en gaging with the next locking bit above it. In the case of the section that is at the top of the series. it may be provided Willi a locking bar similar to that indicated by 40 and the coupling bar T5 may be omitted. This would make unnecessary the high top section that otherwise would be necessary for concealing the upper end of the bar 40 if it were used in the top section in the regular way. By omitting this coupling bar 45 I may also isolate one or moresections from the locking mechanism. so that while such sections contain the locking mechanism similar to the other series, it will not be operated by reason of the fact that the coupling bar 75 has been omitted.

It will be readily understood that the controlling mechanism that is herein described as being embodied in the base section may be embodied in any of the-intermediate sections or in the top section and the locking mechanism will operate in the same manner and as ell'ectively as it does when embodied in the base section. It will also be obvious that many changes may be made in the details of my invention without departing from the spirit thereof, all such changes being regarded within the. scope of my invention.

Having thus described my invention,what Ielaim as new and patent able is as follows:

1. The combination in a case of drawers or filing devices arranged in rows, a rock shaft adjacent to each of said rows of drawers, dogs on said rock shat't capable of en-- gaging with said drawers, a connecting rod connecting a plurality of said rock shafts for simultaneous movement, a longitudinal reciprocating bar moving parallel to said connecting rod, a. lever connecting said bar with the connecting rod. whereby the reciprocation of said bar will cause the reciprocation of the connecting rod and the rocking oi the shafts. v

2. The combination in a tiling device of a reciprocating bar contained therein. aid bar being recessed at each end. studs mounted thereon adjacent to and in line with said recesses, the reciprocating bars of successive filing devices being adapted to engage each other with said recesses and aid s uds so as to cause said bars to move 71] Hhlf-wli. locking mechanisms in said tiling cases operated by said bar.

3. The combination in a liliiny rim ce of a reciprocating bar contained therein, said bar being recessed at each end. studs naunted thereon adjacent to and in line with said l't" cesses, said bar having one end oll'sri f om the other, the reciprocating bars of Sllit' .s-

' each other with said recesses and said studs sive filing devices being adapted to engage so as to cause said bars to move in unison, locking mechanisms in said filing cases operated by said bar.

4:. The combination in-a filing device of a reciprocating bar contained therein, said bar being recessed at each end, studs mounted thereon adjacent to .and in line with said recesses, a latch pivoted at one endof said ,bar, the reciprocating bars of successive filing devices being adapted to engage each other with said recesses and said studs, the pivoted latch of one bar engaging a stud of the next bar, so as to cause saidbars to move positively in unison, locking mechanism in v said filing cases operated .by said bar.

5. The combination in a filing case of a base and a top platev therefor,-perforations in said plates in line with each other, a

bracket mounted on the base plate in line with said-perforations, a guide contained in said bracket, a bar mounted to slide in said guide and in theperforationin the top plate, a lever pivoted on said bracket and having a slotted connection with astud on said bar, whereby the reciprocation of said bar rocks said lever, locking mechanisms in said filing case operated by said lever.

(3. The combination in a* filing case of a base and a top plate therefor, perforations in said plates in line with each other, a bracket mounted on the base plate in line with said perforations, a guide contained in said bracket, a bar mounted to slide in said guide and in the perforation in the top plate, a lever pivoted on said bracket and having aslotted connection, with a stud on.

said bar, whereby the reciprocation of said bar rocks said lever, said lever being provided with a forked end, a crank mounted,

on said case loosely engaged by said forked end and rocking therewith, locking mechanisms insaid filing case operated by said crank. 1

7. The combination in a filing case of a base and a top plate therefor, perforations in said plates in line with each other, a bracket mounted on the basejplate in line with said perforations, a guide contained in said bracket. a bar mounted to slide in said guide and. in the perforation in the top plate, a lever pivoted on saidbracketand having a slotted connection with a stud on said bar, whereby the reciprocation of said bar rocks said lever, said lever being provided with a forked end, a crank mounted on said case. loosely engaged by said forked end and rocking therewith, a series of cranks pivoted in said case in line with the first mentioned crank, a connecting rod coupling all of said cranks together for simultaneous movement,- locking mechanisms connected to said cranks.

8. The combination in a filing case of a base and a top plate therefor, perforations in said plates in line with each other, a bracket mounted on the base plate in line with said perforations, a 'guide contained in said bracket, a bar mounted to. slide in said guide and in'the perforation in the top plate, a lever pivoted on said bracket and havinga slotted connection with a stud on said bar, whereby the reciprocation ofsaid bar rocks said lever, said lever being provided with a forked end, a crank mounted on said case loosely engagedby said forked end and rocking therewith, a series of cranks pivoted in said case in line with the first mentioned crank, a connecting rod coupling all of said cranks together for simultaneous movement, the forked connection between said lever and said cranks permitting a predetermined'amount of oscillation of said crankswithout moving said lever, locking mechanisms connected to said cranks.

I 9. The combination of a series of drawe: sections, locking mechanismin each drawer 'section for locking the drawers thereof, longitudinally movable coupling rods between the locking mechanisms of consecutive sectionslfor causing said. locking mechanisms to move in unison, said'locking mechanism permitting the return and locking of an individual drawer while holding the other drawers of the series of drawer sections ,locked, said locking mechanism including a rock shaft and a locking dog rigidly mounted thereon and a locking dog loosely mounted thereon for each drawer adjacent to said shaft.

10. The combination of a series of drawer sections, locking mechahism in each drawer section for locking the/drawers thereof, longitudinally movable coupling rods positively connected together between the looking mechanisms of consecutive sections for causing said locking mechanisms to move in unison positively in both directions, a base section for said series containing a controlling mechanism for said locking mechanism and a lock for fastening said controlling mechanism to hold the locking mechanism in locking position, each of said sections and its coupling rod moving directly end on into engagement with the section and coupling rodbelow it. e g 11. The combination in a filing case of guides mounted therein, abar mounted to reciprocate in said guides, a pair of studs mounted at the top of said bar,'a coupling bar having at one end a recess to engage one of said studs and a shoulder to engage the other stud, and at the other end a stud and recess to engage with the reciprocating bar in the adjacent section, locking mechanisms in said filing cases operated by 'said bar.

12. The combination in a case of drawers, of filing devices arranged in a plurality of rows, a rock shaft adjacentto each of said rows of drawers, dogs on each of said rock shafts capable of engaging with said drawers, a plurality of connecting rods each connecting two or more of said rock shafts for simultaneous movement independent ofthe rest, a bar parallel to said connecting rods and reciprocating longitudinally adjacent thereto, connections between said bar and said connecting rods whereby the reciprocation-of said barwill cause the reciprocation of the connecting rods and the rocking of the shafts.

13. The combination in a case of drawers, of filing devices arranged in a plurality of rows, a rock shaft adjacent to each of said rows of drawers, dogs on each of said rock shafts capable'of engaging with said draw ers, a plurality of connect-ing rods each connecting two or more of said rock shafts for simultaneous movement independent of the rest, a bar parallel to said connecting rods and reciprocating longitudinally adjacent thereto, loose connections between said bar and said connecting rods whereby said connecting rods and rock shafts attached thereto are each permitted a movement independent of the others and of the bar to permit thelocking of unlocked drawers.

14. The combination in a case of drawers, of filing devices arranged in a plurality of rows, a rock shaft adjacent to each of said rows of drawers, a bar mounted to reciprocate longitudinally to said rock shafts, said bar being connected to said rock shafts to oscillate them, said bar having both male and female members on each end thereof to engage with corresponding members on other bars arranged on either end thereof, by which a series of said bars may be positively coupled to move in unison.

1:3. The combination in a case ofdrawers,

of filing devices arranged in a plurality ofrows, :1 rock shaft adjacent to each of said rows of drawers, a bar mounted to reciprocate longitudinally to said rock shafts, said bar being connected to said rock shafts to oscillate them, said bar having both male and female members on each end thereof to engage with corresponding members on other bars arranged on either end thereof, by which a series of said bars may be positively coupled to move in unison, a latch pivotally mounted on one end of each of said bars, said latch being adapted to engage with the male member of the next adjacent voscillate them, said bar having male and female members on each end thereof to engage with corresponding members on other bars arranged on either end thereof, by which a series of said bars may be positively coupled to -move in unison, a latchpivotally mounted on one end of eaclrof said bars, said latch being adapted to engage with the male member of the next adjacglt bar and positivel hold it in thefemale member of its own ar, a cam'on the end of said latch by which said latch may be moved laterally by said male memberas the bars are moved into engagement with each other.

17. The combination in a series of filing cases com rising drawers of guides mounted in each 0 said cases, bars mounted to reciprocate in each of said guides, a latch ivoted on each of said bars, a lug forme on each of said latches'to contact with said bar and limit the movement of said latchlock ing mechanisms in said filing eases operated by said bar, the bar and latch in one fiction being adapted to move endwise into engagement with the bar in the next adjacent sec- 1 tion, each of said sections and its coupling rod moving directly end on into enga ement with the section and coupling rod be ow it. 1 In testimony whereof I afiix my signature in presence of two witnesses.

ERIC G. SAMPSON. Witnesses: Fara D. M. S'rmwss,

E. F. SIEBERT.

Copies orthil patent may he obtained for in cent: each, by addressing the Commissioner of Patents. Washington; D. c." 

